Nortec 132-3091 manual Nhmc, Figure #12 Water Conditions vs. Cylinder Life, Nhb/Nhp

dependent on water supply conditions and humidifier usage. Failure to replace the cylinder at the end of cylinder life may result in unit damage. NORTEC is not responsible for any damages resulting from, or attributable to, the failure to replace a used cylinder (see Manufacturer’s Warranty). There are many indications, each of which signifies the end of cylinder life.

NHMC

1.After a period of operation (not on initial start-up), the water level will approach the top of the cylinder. (Life varies from 500 to 2000 operating hours, as illustrated in Figure #12.)

Figure #12

Water Conditions vs. Cylinder Life

Capacity Adjustment Setting

		100%	50%	25%
	30				500
ofHardness					400	mg/L(ppm)
	20
					200
Grains						3
	10
						CaCO
	5				100
	500	1000	2000	4000	8000

Cylinder Life Expectancy (average operating hours)

2.There will be reduced output in spite of a 100% capacity setting and/or an unsatisfied demand from the humidistat for more humidity. This is evident by monitoring the unit’s output on the LCD (liquid crystal display) with up to two lines of continually updated alphanumeric information for the user.

3.Each NHMC humidifier has an internal micro-computer that can detect end of cylinder life. If the cylinder is not changed, the humidifier will automatically shut down.

4.The unit’s yellow status lamp is activated anytime there is a system message sent to the LCD where two lines of alphanumeric information await the user. System messages are explained in greater detail later in this manual. Three (3) different messages will appear, in sequence, as the cylinder goes from new to spent to needing replacement.

5.The NHMC is pre-programmed to inform the user of the cylinder’s status. It is important to understand the significance of the unit’s system messages, status lamps and 24VAC circuits for remote indication. Figure #2 summarizes these messages and responses.

6.The three (3) messages that will appear in sequence are “MAXIMAL LEVEL”, then “CYLINDER SPENT”, and finally “CYL. LIFESPAN END”. The yellow unit status lamp will be on during all three.

7.The green unit status lamp, primary contactor and steam output will stop at “CYL. LIFESPAN END”. This distinguishes it from “MAXIMAL LEVEL” and

“CYLINDER SPENT”.

8.Each of these three (3) messages has a unique combination of responses at the terminal strip for remote indication. These unique combinations distinguish them from each other and from any other system message.

9.At “MAXIMAL LEVEL” remote yellow-green-red are OFF-ON-OFF. (Note that “MAXIMAL LEVEL” will also appear at unit start-up.)

10.At “CYLINDER SPENT” remote yellow-green-red are OFF-ON-ON. In other words, the red comes on as the cylinder ages from “MAXIMAL LEVEL” to “CYLINDER SPENT”. This gives the user ample warning (remote red on) to replace the cylinder before the NHMC shuts itself down.

11.At “CYL. LIFESPAN END” remote yellow-green-red are ON-OFF-ON. In other words, the remote green goes off and the remote yellow comes on in addition to the red if “CYLINDER SPENT” remains unchanged for approximately three (3) days.

12.The NHMC is always internally wired to provide 24VAC to the terminal strip for optional external remote indication. Up to 100 mA is available at each of three terminal pairs (61-20, 62-40 and

63-36) for activating yellow, green and red optional external remote indicators, respectively. Any or all of these remote indicators can be utilized. They can be field-supplied resistive 24 VAC loads such as lamps or ordered as options from NORTEC.

NHB/NHP

1.There will be reduced output in spite of a 100% capacity setting and/or an unsatisfied call from the on/off humidistat for more humidity. The NHP has an output display where you will observe that the capacity of the unit is decreasing.

2.Each NHB/NHP humidifier has a yellow status lamp, a green status lamp, and a relay for remote indication. Double units (models NH 150-200) have two of each.

3.The yellow and green status lamps are long-life LED’s (light emitting diodes) not incandescent lamps.

4.The yellow and green status lamps are to be viewed as a pair. This way, they convey four

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